128404480

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{809}}^1$

素因数の和:865

約数の個数: 88

約数和(自身を含む): 318349440

約数和(自身を除く): 189944960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 809, 992, 1024, 1240, 1280, 1618, 1984, 2480, 2560, 3236, 3968, 4045, 4960, 5120, 6472, 7936, 8090, 9920, 12944, 15872, 16180, 19840, 25079, 25888, 31744, 32360, 39680, 50158, 51776, 64720, 79360, 100316, 103552, 125395, 129440, 158720, 200632, 207104, 250790, 258880, 401264, 414208, 501580, 517760, 802528, 828416, 1003160, 1035520, 1605056, 2006320, 2071040, 3210112, 4012640, 4142080, 6420224, 8025280, 12840448, 16050560, 25680896, 32101120, 64202240, 128404480]

約数ペア:

[(1, 128404480), (2, 64202240), (4, 32101120), (5, 25680896), (8, 16050560), (10, 12840448), (16, 8025280), (20, 6420224), (31, 4142080), (32, 4012640), (40, 3210112), (62, 2071040), (64, 2006320), (80, 1605056), (124, 1035520), (128, 1003160), (155, 828416), (160, 802528), (248, 517760), (256, 501580), (310, 414208), (320, 401264), (496, 258880), (512, 250790), (620, 207104), (640, 200632), (809, 158720), (992, 129440), (1024, 125395), (1240, 103552), (1280, 100316), (1618, 79360), (1984, 64720), (2480, 51776), (2560, 50158), (3236, 39680), (3968, 32360), (4045, 31744), (4960, 25888), (5120, 25079), (6472, 19840), (7936, 16180), (8090, 15872), (9920, 12944)]